upload file size limit increased in server.ts

vitest.config.integration.ts

@@ -1,4 +1,5 @@
 // vitest.config.integration.ts
+import path from 'path';
 import { defineConfig } from 'vitest/config';
 
 /**
@@ -6,6 +7,14 @@ import { defineConfig } from 'vitest/config';
  * It runs tests in a Node.js environment, as they need to interact with a live backend server.
  */
 export default defineConfig({
+  // Define the project root and aliases, just like in the main vite.config.ts.
+  // This is crucial for the test runner to correctly resolve module paths.
+  root: '.',
+  resolve: {
+    alias: {
+      '@': path.resolve(process.cwd(), './src'),
+    },
+  },
   test: {
     name: 'integration',
     environment: 'node',